This poster presents solid-state supercapacitors that have been fabricated using graphene-based electrodes and the ionic liquid based gel polymer electrolyte. Supercapacitors are electrochemical energy storage systems. Graphene acts as an excellent material for high capacitance. Their specific capacitance and cyclic performance was evaluated by cyclic voltammetry (CV) and galvanostatic charge-discharge techniques. Extensive impedance spectroscopic studies were carried out to establish specific electrical attributes of the electrolyte and electrode under various cyclic stages.These results show that even after 5000 cycles capacitance is reduced.
Last Updated: 6/3/12